linux-kernel - Re: [PATCHv9 00/12] PCI: Recode Mobiveil driver and add PCIe Gen4 driver for NXP Layerscape SoCs

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Message-ID: <20200229151907.GA7378@mit.edu>
Date:   Sat, 29 Feb 2020 10:19:07 -0500
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     Olof Johansson <olof@...om.net>, Jon Nettleton <jon@...id-run.com>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        "mark.rutland@....com" <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        "arnd@...db.de" <arnd@...db.de>,
        "m.karthikeyan@...iveil.co.in" <m.karthikeyan@...iveil.co.in>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "Z.q. Hou" <zhiqiang.hou@....com>,
        "l.subrahmanya@...iveil.co.in" <l.subrahmanya@...iveil.co.in>,
        "will.deacon@....com" <will.deacon@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Leo Li <leoyang.li@....com>,
        "M.h. Lian" <minghuan.lian@....com>,
        Xiaowei Bao <xiaowei.bao@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "andrew.murray@....com" <andrew.murray@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        Mingkai Hu <mingkai.hu@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCHv9 00/12] PCI: Recode Mobiveil driver and add PCIe Gen4
 driver for NXP Layerscape SoCs

On Sat, Feb 29, 2020 at 11:04:56AM +0000, Russell King - ARM Linux admin wrote:
> 
> Could it be a race condition, or some problem that's specific to the
> ARM64 kernel that's provoking this corruption?

Since I got brought in mid-way through this discussion, can someone
summarize the vital details of the bughunt?  What kernel version is
involved, and is this a regression?  If so, what's the last version of
the kernel where you didn't have a problem on this hardware?

Can you trigger this failure reliably?

Unfortunately, while I'm regularly running xfstests on x86_64 on a
Google Compute Engine VM, I'm not doing any runs on arm64.  I can
certainly build an arm-64.

There's a test-appliance designed to be run on ARM64 here[1].

[1] https://kernel.org/pub/linux/kernel/people/tytso/kvm-xfstests/xfstests-amd64.tar.xz

which is a Debian chroot, designed to be run via android-xfstests[2], but
if you unpack it, it should be possible to enter the chroot and
trigger the xfstests run manually on any arm64 system.

[2] https://thunk.org/android-xfstests

Does anyone know if kernel CI is running xfstests regularly?

Cheers,

							- Ted